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Daikin FTXS50FVLT [122/244] High pressure control in cooling
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Si04-703A Troubleshooting
Service Diagnosis 111
4.14 High Pressure Control in Cooling
Remote
Controller
Display
F6
Method of
Malfunction
Detection
High-pressure control (stop, frequency drop, etc.) is activated in the cooling mode if the
temperature being sensed by the heat exchanger thermistor exceeds the limit.
Malfunction
Decision
Conditions
Activated when the temperature being sensed by the heat exchanger thermistor rises above
65°C. (Deactivated when the said temperature drops below 51°C.)
Supposed
Causes
The installation space is not large enough.
Faulty outdoor unit fan
Faulty electronic expansion valve
Faulty defrost thermistor
Faulty outdoor unit PCB
Faulty stop valve
Dirty heat exchanger
Содержание
- Inverter pair 1
- Si04 703a 1
- Wall mounted type f series 1
- Cooling only indoor units 2
- Heat pump indoor units 2
- Inverter pair f series 2
- Outdoor units 2
- Table of contents 2
- Control specification 4 3
- Function of thermistor 2 3
- Introduction v 3
- List of functions 3
- Main functions 8 3
- Part 1 list of functions 3
- Part 2 specifications 3
- Part 3 printed circuit board connector wiring diagram 1 3
- Part 4 function and control 7 3
- Printed circuit board connector wiring diagram 2 3
- Specifications 0 3
- Caution for diagnosis 8 2 problem symptoms and measures 9 3 service check function 0 4 troubleshooting 3 4
- Check 30 4
- Part 5 operation manual 9 4
- Part 6 service diagnosis 7 4
- System configuration 0 2 instruction 1 4
- Drawings flow charts v 5
- Index i 5
- Indoor unit 40 5
- Others 12 5
- Outdoor unit 58 5
- Part 7 removal procedure 39 5
- Part 8 others 11 5
- Part 9 appendix 15 5
- Piping diagrams 16 5
- Wiring diagrams 21 5
- Cautions regarding safety of workers 6
- Introduction 6
- Safety cautions 6
- Warning 6
- Caution 7
- Warning 7
- Cautions regarding safety of users 8
- Warning 8
- Caution 9
- Warning 9
- Caution 10
- Icons are used to attract the attention of the reader to specific information the meaning of each icon is described in the table below 10
- Used icons 10
- List of functions 12
- Part 1 list of functions 12
- Cooling only 13
- Holding functions no functions 13
- List of functions 13
- List of functions si04 703a 13
- Holding functions no functions 14
- List of functions 3 14
- Si04 703a list of functions 14
- Holding functions no functions 15
- List of functions 15
- List of functions si04 703a 15
- Heat pump 16
- Holding functions no functions 16
- List of functions 5 16
- Si04 703a list of functions 16
- Holding functions no functions 17
- List of functions 17
- List of functions si04 703a 17
- Holding functions no functions 18
- List of functions 7 18
- Si04 703a list of functions 18
- Part 2 specifications 20
- Specifications 0 20
- Cooling only 21
- Hz 220 230 240v 60hz 220 230v 21
- Specifications 21
- Specifications si04 703a 21
- Hz 220 230 240v 60hz 220 230v 22
- Si04 703a specifications 22
- Specifications 11 22
- Hz 220 230 240v 60hz 220 230v 23
- Specifications 23
- Specifications si04 703a 23
- Hz 220 230 240v 60hz 220 230v 24
- Si04 703a specifications 24
- Specifications 13 24
- Hz 220v 25
- Specifications 25
- Specifications si04 703a 25
- Heat pump 26
- Hz 220 230 240v 60hz 220 230v 26
- Si04 703a specifications 26
- Specifications 15 26
- Hz 220 230 240v 60hz 220 230v 27
- Specifications 27
- Specifications si04 703a 27
- Hz 220 230 240v 60hz 220 230v 28
- Si04 703a specifications 28
- Specifications 17 28
- Hz 220v 29
- Specifications 29
- Specifications si04 703a 29
- Hz 220v 30
- Si04 703a specifications 30
- Specifications 19 30
- Part 3 printed circuit board connector wiring diagram 32
- Printed circuit board connector wiring diagram 2 32
- Indoor units 33
- Printed circuit board connector wiring diagram 33
- Pcb 2 signal receiver pcb pcb 3 buzzer pcb 34
- Pcb 4 display pcb pcb 5 intelligent eye sensor pcb 34
- Pcb detail pcb 1 control pcb indoor unit 34
- Printed circuit board connector wiring diagram 23 34
- Si04 703a printed circuit board connector wiring diagram 34
- Outdoor units 35
- Pcb 1 main pcb outdoor unit 71 80 90 models 36
- Pcb detail pcb 1 main pcb outdoor unit 50 60 models 36
- Printed circuit board connector wiring diagram 25 36
- Si04 703a printed circuit board connector wiring diagram 36
- Pcb 2 service monitor pcb 37
- Printed circuit board connector wiring diagram 37
- Printed circuit board connector wiring diagram si04 703a 37
- Control specification 4 38
- Function of thermistor 2 38
- Main functions 8 38
- Part 4 function and control 38
- Additional control parameters 39
- Drawing of inverter the following drawing shows a schematic view of the inverter principle 39
- Forced cooling operation 39
- Frequency principle 39
- Frequency restrictions 39
- Initial settings 39
- Inverter principle to regulate the capacity a frequency control is needed the inverter makes it possible to vary the rotation speed of the compressor the following table explains the conversion principle 39
- Main control parameters the compressor is frequency controlled during normal operation the target frequency is set by the following 2 parameters coming from the operating indoor unit 39
- Main functions 39
- Note see the list of functions for the functions applicable to different models 39
- The difference between the room temperature and the set temperature 39
- The load condition of the operating indoor unit 39
- The target frequency is adapted by additional parameters in the following cases 39
- Comfortable air conditioning a detailed adjustment is integrated to ensure a fixed room temperature it is possible to air condition with a small room temperature variation 40
- Energy saving heating and cooling once the set temperature is reached the energy saving operation enables to maintain the room temperature at low power 40
- Even during extreme cold weather the high capacity is achieved it is maintained even when the outside temperature is 2 c 40
- For more information refer to forced operation mode on page 40
- Forced cooling operation 40
- Frequency limits the following table shows the functions that define the minimum and maximum frequency 40
- Inverter features the inverter provides the following features 40
- Quick heating and quick cooling the compressor rotational speed is increased when starting the heating or cooling this enables a quick set temperature 40
- The regulating capacity can be changed according to the changes in the outside temperature and cooling heating load 40
- Power airflow dual flaps wide angle louvers and auto swing 41
- Fan speed control for indoor units 42
- In case of inverter units the microcomputer automatically sets the temperature and fan settings the difference between the room temperature at startup and the temperature set by the microcomputer is divided into two zones then the unit operates in the dry mode with an appropriate capacity for each zone to maintain the temperature and humidity at a comfortable level 43
- Programme dry function 43
- Programme dry function removes humidity while preventing the room temperature from lowering since the microcomputer controls both the temperature and airflow volume the temperature adjustment and fan adjustment buttons are inoperable in this mode 43
- Zone a thermostat off 43
- Zone b zone b 43
- Zone c thermostat on 43
- Automatic operation 44
- Cooling dry 45
- Function and control 45
- Heating 45
- Main functions si04 703a 45
- The monitoring time has passed while the temperature difference is in the zone b cooling dry 10 minutes heating 10 seconds 45
- The operation turns on in any zones except a 45
- The system resumes from defrost control in any zones except a 45
- The temperature difference is above the zone c after being in the zone a 45
- The temperature difference is in the zone a 45
- Thermostat control 45
- Thermostat control is based on the difference between the room temperature and the setpoint 45
- Thermostat off condition 45
- Thermostat on condition 45
- Night set mode 46
- A microcomputer in an indoor unit carries out a sampling every 20 msec and if it detects 10 cycles of the wave in one second in total corresponding to 20msec 10 200msec it judges human is in the room as the motion signal is on 47
- Function and control 47
- In case of fan mode the fan speed reduces by 50 rpm 47
- Intelligent eye 47
- Main functions si04 703a 47
- Processing 1 detection method by intelligent eye 47
- The motions for example in cooling 47
- This is the function that detects existence of humans in the room by a human motion sensor intelligent eye and reduces the capacity when there is no human in the room in order to save electricity 47
- This sensor detects human motion by receiving infrared rays and displays the pulse wave output 47
- When a microcomputer doesn t have a signal from the sensor in 20 minutes it judges that nobody is in the room and operates the unit in temperature shifted 2 c from the set temperature cooling dry 2 c higher heating 2 c lower and auto according to the operation mode at that time 47
- Home leave operation 49
- Details of the control when powerful button is pushed in each operation mode the fan speed setting temperature will be converted to the following states in a period of 20 minutes 50
- Ex powerful operation in cooling mode 50
- Inverter powerful operation 50
- Outline in order to exploit the cooling and heating capacity to full extent operate the air conditioner by increasing the indoor fan rotating speed and the compressor frequency 50
- Air filter prefilter 51
- Hot start function 51
- On off button on indoor unit 51
- Other functions 51
- Self diagnosis digital display 51
- Signal receiving sign 51
- Titanium apatite photocatalytic air purifying filter 51
- Auto restart function 52
- Even if a power failure including one for just a moment occurs during the operation the operation restarts in the condition before power failure automatically when power is restored note it takes 3 minutes to restart the operation because the 3 minute standby function is activated 52
- Function of thermistor 53
- Heat pump model 53
- Cooling only model 54
- Control specification 55
- Control specification si04 703a 55
- Detail 1 for heat pump model there are following modes stop cooling includes drying heating include defrosting 55
- For cooling only model there are following models stop and cooling including drying 55
- Function and control 55
- Mode hierarchy 55
- Note unless specified otherwise an indoor dry operation command must be regarded as cooling operation 55
- Outline there are two modes the mode selected in user s place normal air conditioning mode and forced operation mode for installation and providing service 55
- Frequency control 56
- D signal 57
- D signal and is used for frequency command 57
- D signal the difference between a room temperature and the temperature set by the remote controller will be taken as the 57
- D value in each sampling time 20 seconds and adjust the frequency according to its difference from the frequency previously calculated 57
- D value is large increase the frequency 57
- D value is small lower the frequency when the 57
- D value obtaining the fixed 57
- D value of the indoor unit and the q value of the indoor unit q value indoor unit output determined from indoor unit volume airflow rate and other factors 57
- D value when the 57
- Determine lower limit frequency 57
- Determine prohibited frequency 57
- Determine upper limit frequency 57
- For limiting lower limit frequency management is carried out only when the frequency rises 57
- Frequency initial setting 57
- Frequency management when other controls are functioning 57
- I control if the operating frequency is not change more than a certain fixed time adjust the frequency up and down according to the 57
- Indoor frequency command 57
- Limit of frequency variation width when the difference between input current and input current drooping value is less than 1 a the frequency increase width must be limited 57
- Outlin 57
- P control calculate 57
- Pi control determine frequency up down by 57
- Set a maximum value as an lower limit frequency among the frequency lower limits of the following functions pressure difference upkeep 57
- Set a minimum value as an upper limit frequency among the frequency upper limits of the following functions compressor protection input current discharge pipes freeze prevention dew prevention fin thermistor temperature 57
- Th off thermostat off 57
- There is a certain prohibited frequency such as a power supply frequency 57
- Upper and lower limit of frequency by pi control the frequency upper and lower limits are set depending on indoor unit when low noise commands come from the indoor unit or when outdoor unit low noise or quiet commands come from indoor unit the upper limit frequency must be lowered than the usual setting 57
- When frequency is drooping frequency management is carried out only when the frequency droops 57
- When starting the compressor or when conditions are varied due to the change of the room the frequency must be initialized according to the total of a maximum 57
- Controls at mode changing start up 58
- Four way valve operation compensation 58
- Four way valve switching 58
- Preheating operation 58
- 3 minute standby 59
- Compressor protection function 59
- Detail divide the zone 59
- Discharge pipe temperature control 59
- Management within the zones 59
- Outline the discharge pipe temperature is used as the compressor s internal temperature if the discharge pipe temperature rises above a certain level the operating frequency upper limit is set to keep this temperature from going up further 59
- Prohibit to turn on the compressor for 3 minutes after turning it off except when defrosting only for heat pump model 59
- Reset zone discharge pipe temperature 59
- Stop zone 59
- When turning the compressor from off to on the upper limit of frequency must be set as follows the function must not be used when defrosting only for heat pump model 59
- After this the output frequency is pulled down by 2hz every second until it reaches the steady zone keep zone 60
- Detail 60
- Frequency control in each zone drooping zone 60
- Input current control 60
- Limit of the frequency is cancelled stop zone 60
- Limitation of current drooping and stop value according to the outdoor air temperature 1 in case the operation mode is cooling 60
- Outline the microcomputer calculates the input current during the compressor is running and set the frequency upper limit from such input current in case of heat pump model this control is the upper limit control function of the frequency which takes priority of the lower limit of four way valve activating compensation 60
- The current droops when outdoor air temperature becomes higher than a certain level model by model 60
- The current droops when outdoor air temperature becomes higher than a certain level model by model 2 in case the operation mode is heating only for heat pump model 60
- The maximum limit of the compressor frequency in this control is defined as operation frequency 2hz 60
- The present maximum frequency goes on reset zone 60
- Freeze up protection control 61
- Heating peak cut control 61
- Fan control 62
- Liquid compression protection function 2 62
- 90fvma 63
- Control specification si04 703a 63
- Defrost control 63
- Detail conditions for starting defrost the starting conditions must be made with the outdoor air temperature and heat exchanger temperature under the conditions that the system is in heating operation 6 minutes after the compressor is started and more than 44 minutes of accumulated time pass since the start of the operation or ending the defrosting conditions for canceling defrost the judgment must be made with heat exchanger temperature 4 c 12 c 50 60 class 71fvm t 63
- Function and control 63
- Outline heat pump only defrosting is carried out by the cooling cycle reverse cycle the defrosting time or outdoor heat exchanger temperature must be more than its fixed value when finishing 63
- Detail the followings are the examples of control which function in each mode by the electronic expansion valve control 64
- Electronic expansion valve control 64
- Function and control 53 64
- Outline the following items are included in the electronic expansion valve control electronic expansion valve is fully closed 1 electronic expansion valve is fully closed when turning on the power 2 pressure equalizing control open control 1 electronic expansion valve control when starting operation 2 control when frequency changed 3 control for defrosting only for heat pump model 4 control when a discharge pipe temperature is abnormally high 5 control when the discharge pipe thermistor is disconnected feedback control 1 discharge pipe temperature control 64
- Si04 703a control specification 64
- Disconnection of the discharge pipe thermistor 65
- Fully closing with power on 65
- High temperature of the discharge pipe 65
- Opening limit 65
- Pressure equalization control 65
- Starting operation control 65
- Control when frequency is changed 66
- Target discharge pipe temperature control 66
- Detection of overload and over current 67
- Insufficient gas control 67
- Malfunctions 67
- Sensor malfunction detection 67
- Additional function 68
- Compressor operating frequency is increased to pi max max hz of operating room and outdoor unit airflow rate is increased 68
- Detail forced cooling 68
- Detail judgment by input current when an output frequency is exceeds 55 hz 40hz for 71 90 class and the input current is less than specified value the adjustment is made for insufficient gas judgment by discharge pipe temperature when discharge pipe temperature is 20 60 c depending on the model or mode higher than target value and the electronic expansion value opening is 450 480 pulse max the adjustment is made for insufficient gas 68
- Forced operation mode 68
- Outline forced operating mode includes only forced cooling 68
- Power supply voltage is detected each time equipment operation starts 68
- Powerful operation mode 68
- Voltage detection function 68
- Part 5 operation manual 70
- System configuration 0 2 instruction 1 70
- System configuration 71
- Caution 72
- Instruction 72
- Safety precautions 72
- Warning 72
- Consider nuisance to your neighbours from noises 73
- Electrical work 73
- Installation site 73
- System relocation 73
- Indoor unit 74
- Names of parts 74
- 60 class 71 80 90 class 75
- Outdoor unit 75
- Arc433b70 7 76
- Remote controller 76
- Preparation before operation 77
- To set the batteries 77
- Attention 78
- Choose a place from where the signals reach the unit 78
- Place the remote controller in the remote controller holder 78
- Preparation before operation 78
- To fix the remote controller holder on the wall 78
- To operate the remote controller 78
- Be careful not to cool heat the room too much keeping the temperature setting at a moderate level helps save energy 79
- Clogged air filters cause inefficient operation and waste energy clean them once in about every two weeks 79
- Cover windows with a blind or a curtain blocking sunlight and air from outdoors increases the cooling heating effect 79
- If you are not going to use the air conditioner for a long period for example in spring or autumn turn the breaker off 79
- Operation outside this humidity or temperature range may cause a safety device to disable the system 79
- Please note 79
- Press clock button 79
- The air conditioner always consumes 15 35 watts of electricity even while it is not operating 79
- Tips for saving energy 79
- To set the clock 79
- Turn the breaker on 79
- Use the air conditioner in the following conditions 79
- Auto dry cool heat fan operation 80
- To change the temperature setting 80
- To start operation 80
- To stop operation 80
- Press fan setting button 81
- To change the airflow rate setting 81
- Adjusting the airflow direction 82
- To adjust the horizontal blade flap 82
- To adjust the vertical blades louvers 82
- Notes on flap angle 83
- Notes on louvers angles 83
- Press either the swing button or the swing button 83
- Press the swing button and the swing button the and display will light up and the flap and louvers will move in turn 83
- To 3 d airflow 83
- To cancel 3 d airflow 83
- Powerful operation 84
- To cancel powerful operation 84
- To start powerful operation 84
- Outdoor unit quiet operation 85
- To cancel outdoor unit quiet operation 85
- To start outdoor unit quiet operation 85
- Before using home leave operation 86
- Home leave operation 86
- To cancel home leave operation 86
- To start home leave operation 86
- Use as a favorite mode 87
- Use as an energy saving mode 87
- Useful in these cases 87
- What s the home leave operation 87
- Intelligent eye operation 88
- To cancel the intelligent eye operation 88
- To start intelligent eye operation 88
- Caution 89
- Intelligent eye is useful for energy saving 89
- Notes on intelligent eye 89
- Timer operation 90
- To cancel the off timer operation 90
- To use off timer operation 90
- Attention 91
- Press cancel button 91
- Press on timer button 91
- Press on timer button again 91
- Press timer setting button until the time setting reaches the point you like 91
- To cancel on timer operation 91
- To combine on timer and off timer 91
- To use on timer operation 91
- Care and cleaning 92
- Caution 92
- Front panel 92
- Indoor unit outdoor unit and remote controller 92
- After washing shake off remaining water and dry in the shade 4 since the material is made out of polyester do not wring out the filter when removing water from it 93
- Air filter 93
- Clean or replace each filter 93
- Filters 93
- If it is very dirty soak it for 10 to 15 minutes in water mixed with a neutral cleaning agent 93
- Maintenance 93
- Open the front panel page 24 2 pull out the air filters 93
- Remove dust with a vacuum cleaner and wash lightly with water 2 93
- Remove the tabs on the filter frame and replace with a new filter 93
- Replacement 93
- Set the air filter and the titanium apatite photocatalytic air purifying filter as they were and close the front panel 93
- Take off the titanium apatite photocatalytic air purifying filter 93
- Titanium apatite photocatalytic air purifying filter 93
- Wash the air filters with water or clean them with vacuum cleaner 93
- After operation stops turn off the breaker for the room air conditioner 94
- Before a long idle period 94
- Clean the air filters and set them again 94
- Dispose of old filters as non flammable waste 94
- Operate the fan only for several hours on a fine day to dry out the inside 94
- Press mode button and select fan operation 94
- Press on off button and start operation 94
- Take out batteries from the remote controller 94
- Titanium apatite photocatalytic air purifying filter without frame 1 set 94
- To order titanium apatite photocatalytic air purifying filter contact to the service shop there you bought the air conditioner 94
- Case explanation 95
- These cases are not troubles 95
- Trouble shooting 95
- Troubleshooting 95
- Case check 96
- Check again 96
- Call the service shop immediately 97
- Disposal requirements 97
- The power cord is abnormally hot or damaged an abnormal sound is heard during operation the safety breaker a fuse or the earth leakage breaker cuts off the operation frequently a switch or a button often fails to work properly there is a burning smell water leaks from the indoor unit 97
- Turn the breaker off and call the service shop 97
- Warning 97
- We recommend periodical maintenance 97
- Caution for diagnosis 8 2 problem symptoms and measures 9 3 service check function 0 4 troubleshooting 3 98
- Check 30 98
- Part 6 service diagnosis 98
- Caution for diagnosis 99
- Problem symptoms and measures 100
- Arc433b70 71 101
- Check method 1 1 when the timer cancel button is held down for 5 seconds a 101
- In the arc433 series remote controller the temperature display sections on the main unit indicate corresponding codes 101
- Indication flashes on the temperature display section 101
- Note 1 a short beep and two consecutive beeps indicate non corresponding codes 2 to cancel the code display hold the timer cancel button down for 5 seconds the code display also cancels itself if the button is not pressed for 1 minute 101
- Press the timer cancel button repeatedly until a continuous beep is produced 101
- Service check function 101
- The code indication changes in the sequence shown below and notifies with a long beep 101
- Displayed only when system down occurs 104
- Error codes and description 104
- Troubleshooting 104
- Indoor unit pcb abnormality 105
- Freeze up protection control or high pressure control 106
- Be sure to turn off power switch before connect or disconnect connector or parts damage may be occurred 107
- Caution 107
- Check no 6 refer to p 32 107
- Service diagnosis 107
- Troubleshooting 107
- Troubleshooting si04 703a 107
- Fan motor dc motor or related abnormality 108
- Be sure to turn off power switch before connect or disconnect connector or parts damage may be occurred 109
- Caution 109
- Check no 1 refer to p 30 109
- Service diagnosis 109
- Troubleshooting 109
- Troubleshooting si04 703a 109
- Thermistor or related abnormality indoor unit 110
- Signal transmission error between indoor and outdoor unit 111
- Caution be sure to turn off power switch before connect or disconnect connector or parts damage may be occurred 112
- Check no 0 refer to p 35 112
- Service diagnosis 101 112
- Si04 703a troubleshooting 112
- Troubleshooting 112
- Outdoor unit pcb abnormality 113
- A compressor overload is detected through compressor ol 114
- Check no 1 refer to p 35 114
- Check no 4 refer to p 30 114
- Check no 5 refer to p 31 114
- Check no 6 refer to p 32 114
- Electronic expansion valve defective 114
- Four way valve malfunctioning 114
- If the compressor ol is activated twice the system will be shut down 114
- Malfunction decision conditions 114
- Method of malfunction detection 114
- Ol activation compressor overload 114
- Outdoor unit pcb defective 114
- Refrigerant shortage 114
- Remote controller display 114
- Stop valve defective 114
- Supposed causes 114
- The error counter will reset itself if this or any other error does not occur during the following 60 minute compressor running time total time 114
- The operating temperature condition is not specified 114
- Troubleshooting 114
- Water mixed in the local piping 114
- A compressor lock is detected by checking the compressor running condition through the position detection circuit 115
- Clearing condition continuous run for about 5 minutes normal 115
- Compressor lock 115
- Compressor locked 115
- Judging from current waveform generated when high frequency voltage is applied to the compressor 115
- Malfunction decision conditions 115
- Method of malfunction detection 115
- Remote controller display 115
- Supposed causes 115
- The system will be shut down if the error occurs 16 times 115
- Troubleshooting 115
- Dc fan lock 116
- Input over current detection 117
- Be sure to turn off power switch before connect or disconnect connector or parts damage may be occurred 118
- Caution 118
- Check no 4 refer to p 37 118
- Check no 7 refer to p 33 118
- Check no 8 refer to p 34 118
- Service diagnosis 107 118
- Si04 703a troubleshooting 118
- Troubleshooting 118
- Four way valve abnormality 119
- Caution be sure to turn off power switch before connect or disconnect connector or parts damage may be occurred 120
- Check no 1 refer to p 35 120
- Check no 5 refer to p 31 120
- Check no 6 refer to p 32 120
- Service diagnosis 109 120
- Si04 703a troubleshooting 120
- Troubleshooting 120
- Check no 1 refer to p 35 121
- Check no 4 refer to p 30 121
- Check no 6 refer to p 32 121
- Discharge pipe temperature control 121
- Discharge pipe thermistor defective heat exchanger or outdoor temperature thermistor defective 121
- Electronic expansion valve defective 121
- Four way valve malfunctioning 121
- If a stop takes place 6 times successively due to abnormal discharge pipe temperature the system will be shut down 121
- If the temperature being detected by the discharge pipe thermistor rises above c the compressor will stop the error is cleared when the temperature has dropped below c 121
- Malfunction decision conditions 121
- Method of malfunction detection 121
- Outdoor unit pcb defective 121
- Refrigerant shortage 121
- Remote controller display 121
- Stop valve defective 121
- Supposed causes 121
- The discharge pipe temperature control stop frequency drooping etc is checked with the temperature being detected by the discharge pipe thermistor 121
- The error counter will reset itself if this or any other error does not occur during the following 60 minute compressor running time total time 121
- Troubleshooting 121
- Water mixed in the local piping 121
- High pressure control in cooling 122
- Be sure to turn off power switch before connect or disconnect connector or parts damage may be occurred 123
- Caution 123
- Check no 4 refer to p 30 123
- Check no 6 refer to p 32 123
- Check no 7 refer to p 33 123
- Check no 9 refer to p 34 123
- Service diagnosis 123
- Troubleshooting 123
- Troubleshooting si04 703a 123
- Compressor sensor system abnormality 124
- Caution be sure to turn off power switch before connect or disconnect connector or parts damage may be occurred 125
- Service diagnosis 125
- Troubleshooting 125
- Troubleshooting si04 703a 125
- A compressor startup failure is detected by checking the compressor running condition through the position detection circuit 126
- Check no 3 refer to p 36 126
- Clearing condition continuous run for about 5 minutes normal 126
- Compressor itself defective 126
- Compressor relay cable disconnected 126
- Input voltage out of specification 126
- Malfunction decision conditions 126
- Method of malfunction detection 126
- Outdoor unit pcb defective 126
- Position sensor abnormality 126
- Remote controller display 126
- Stop valve closed 126
- Supposed causes 126
- The compressor fails to start in about 15 seconds after the compressor run command signal is sent 126
- The system will be shut down if the error occurs 8 times 126
- Troubleshooting 126
- Ct or related abnormality 127
- Caution be sure to turn off power switch before connect or disconnect connector or parts damage may be occurred 128
- Check no 2 refer to p 36 128
- Service diagnosis 117 128
- Si04 703a troubleshooting 128
- Troubleshooting 128
- Thermistor or related abnormality outdoor unit 129
- Caution be sure to turn off power switch before connect or disconnect connector or parts damage may be occurred 130
- Check no 6 refer to p 32 130
- Discharge pipe thermistor 130
- Outdoor air thermistor 130
- Outdoor heat exchanger thermistor 130
- Radiation fin thermistor 130
- Service diagnosis 119 130
- Si04 703a troubleshooting 130
- Troubleshooting 130
- Electrical box temperature rise 131
- Caution be sure to turn off power switch before connect or disconnect connector or parts damage may be occurred 132
- Check no 7 refer to p 33 132
- Check no 9 refer to p 34 132
- Service diagnosis 121 132
- Si04 703a troubleshooting 132
- Troubleshooting 132
- Radiation fin temperature rise 133
- Caution be sure to turn off power switch before connect or disconnect connector or parts damage may be occurred 134
- Check no 7 refer to p 33 134
- Check no 9 refer to p 34 134
- Note1 refer to 1 application of silicon grease to a power transistor and a diode bridge on p214 134
- Service diagnosis 123 134
- Si04 703a troubleshooting 134
- Troubleshooting 134
- Output over current detection 135
- Caution be sure to turn off power switch before connect or disconnect connector or parts damage may be occurred 136
- Check no 3 refer to p 36 136
- Check no 7 refer to p 33 136
- Check no 8 refer to p 34 136
- Service diagnosis 125 136
- Si04 703a troubleshooting 136
- Troubleshooting 136
- Insufficient gas 137
- Caution be sure to turn off power switch before connect or disconnect connector or parts damage may be occurred 138
- Check no 4 refer to p 30 138
- Check no 6 refer to p 32 138
- Service diagnosis 127 138
- Si04 703a troubleshooting 138
- Troubleshooting 138
- An abnormal voltage rise or drop is detected by checking the detection circuit or dc voltage detection circuit 139
- An over voltage signal is fed from the over voltage detection circuit to the microcomputer or the voltage being detected by the dc voltage detection circuit is judged to be below 150 v for 0 second 139
- Clearing condition continuous run for about 60 minutes normal 139
- Low voltage detection or over voltage detection 139
- Malfunction decision conditions 139
- Method of malfunction detection 139
- Over voltage detector or dc voltage detection circuit defective 139
- Pam control part s defective 139
- Remote controller display 139
- Short circuit inside the fan motor winding 139
- Supply voltage not as specified 139
- Supposed causes 139
- The system will be shut down if the error occurs 16 times 139
- Troubleshooting 139
- Signal transmission error on outdoor unit pcb 140
- Electronic expansion valve check 141
- Fan motor connector output check 141
- How to check 141
- Check no 5 142
- Four way valve performance check 142
- Service diagnosis 131 142
- Si04 703a check 142
- Check no 6 remove the connectors of the thermistors on the pcb and measure the resistance of each thermistor using tester the relationship between normal temperature and resistance is shown in the graph and the table below 143
- Thermistor resistance check 143
- Check no 7 144
- Installation condition check 144
- Service diagnosis 133 144
- Si04 703a check 144
- Check no 8 145
- Check no 9 145
- Check si04 703a 145
- Discharge pressure check 145
- Outdoor unit fan system check with dc motor 145
- Service diagnosis 145
- Check no 0 measure the power supply waveform between pins 1 and 2 on the terminal board and check the waveform disturbance 146
- Check no 1 146
- Check to see if the power supply waveform is a sine wave fig 146
- Check to see if there is waveform disturbance near the zero cross sections circled in fig 146
- Fig fig 146
- Inverter units refrigerant system check 146
- Power supply waveforms check 146
- Service diagnosis 135 146
- Si04 703a check 146
- Capacitor voltage check 147
- Check no 2 before this checking be sure to check the main circuit for short circuit 147
- Check no 3 147
- Checking the capacitor voltage 147
- Checking the power transistor 147
- For the uvw make measurements at the faston terminal on the board or the relay connector 147
- If unavoidably necessary to touch a live part make sure the power transistor s supply voltage is below 50 v using the tester 147
- Never touch any live parts for at least 10 minutes after turning off the circuit breaker 147
- Power transistor check 147
- With the circuit breaker still on measure the voltage according to the drawing of the model in question be careful never to touch any live parts 147
- Main circuit electrolytic capacitor check 148
- Turning speed pulse input on the outdoor unit pcb check 148
- Indoor unit 40 150
- Outdoor unit 58 150
- Part 7 removal procedure 150
- Indoor unit 151
- Removal of air filter front panel 151
- Removal of front grille 154
- Removal of horizontal blades vertical blades 156
- Removal of electrical box pcb swing motor 158
- Removal of heat exchanger 164
- Removal of fan rotor fan motor 167
- Outdoor unit 169
- Removal of the panels and plates 169
- Rks 50 71 fvm rks 71 gvmg rk x s 50 60 fvma rk x s 50 71 fvlt 169
- Removal of the fan motor propeller fan 173
- Pull the fan motor out 176
- Put the lead wire through the back of the motor when reassembling so as not to be entangled with the propeller fan 176
- Removal of the electrical box 177
- Removal of the pcb 181
- Lift up and remove the pcb 183
- Loosen the 3 fixing screws for the main pcb 183
- Undo the 4 hooks 183
- Removal of the sound blanket 184
- Removal of the four way valve 186
- Removal of the electronic expansion valve 187
- Removal of the compressor 189
- Removal of outer panels 192
- Rks 71 fvma rxs 71 80 90 fvma 192
- Slide the panel downward to undo 2 hooks on the back side 195
- Remove the 2 screws 196
- Remove the right side panel 196
- Removing the front panel 2 196
- Remove the front panel 2 197
- Slide the panel downward to undo the hook 197
- Next slide the grille downward to undo the 2 hooks at the top 199
- Remove the discharge grille 199
- Remove the propeller fan fixing nut fan fixing nut m8 199
- Remove the 2 fixing screws on the partition plate 200
- Remove the screw at bottom left of the front 200
- Remove the screw at bottom of the left side 200
- Remove the screw at bottom of the back side 201
- The front panel 1 is provided with a hook on its front lift the front panel off position to remove it 201
- Remove the 3 screws 203
- Remove the wire fixing plate 203
- Slide the panel leftward to undo the hook and remove the partition plate 203
- Remove the 3 fixing screws on the partition plate 204
- The holder is secured in the clearances of the heat exchanger fins 204
- Undo the holder of the thermistor 204
- Lift the panel upward to undo the 2 hooks and remove it 205
- Remove the fixing screw from the bottom frame 205
- Remove the fixing screw from the shut off valve mounting plate 205
- Remove the rear panel 206
- Removal of the electrical box 207
- Removal of the pcb 211
- Lift up and remove the pcb 213
- Loosen the 3 fixing screws for the main pcb 213
- Undo the 4 hooks 213
- Removal of fan motor 214
- Removal of coils thermistors 215
- Remove the discharge pipe thermistor 216
- Remove the sound blanket top upper 216
- Slightly open the sound blanket 216
- Remove the fixture 217
- Remove the four way valve coil 217
- Remove the screw 217
- Removing the four way valve coil and motorized valve coil 217
- Removal of sound blanket 218
- Remove the sound blanket outer sleeve 220
- Procedure warning be sure to wait 10 minutes or more after turning off all power supplies before disassembling work 221
- Pull out the 3 leads using long nose pliers 221
- Removal of compressor 221
- Remove the 3 screws 221
- Remove the ol 221
- Remove the terminal cover 221
- U red v yellow w blue 221
- Others 12 222
- Part 8 others 222
- Others 223
- Test run from the remote controller 223
- Control pcb of the indoor unit 1 remove the front grille 3 screws 2 remove the electrical box 1 screw 3 remove the drip proof plate 4 tabs 4 cut the address jumper ja on the control pcb 224
- How to set the different addresses 224
- Jumper setting 224
- Jumper settings 224
- When two indoor units are installed in one room the two wireless remote controllers can be set for different addresses 224
- When two units are installed in one room 224
- Wireless remote controller 1 slide the front cover and take it off 2 cut the address jumper j4 224
- Application of silicon grease to a power transistor and a diode bridge 225
- Not applied paper wastage 225
- Ok evenly applied silicon grease ng not evenly applied ng foreign object 225
- Power transistor trm tpm igbt ipm spm etc 225
- Take out a pcb diode bridge diode bridge rectifier stack etc 225
- Part 9 appendix 226
- Piping diagrams 16 226
- Wiring diagrams 21 226
- Cooling only 227
- Ftks50 60fvm ftks50 60fvma ftks50 60fvlt ftks71fvm ftks71fvma ftks71fvlt 227
- Ftxs50 60fvma ftxs50 60fvlt ftxs71 80 90fvma ftxs71fvlt 227
- Heat pump 227
- Indoor units 227
- Piping diagrams 227
- Appendix 217 228
- Cooling only 228
- Outdoor units 228
- Rks50 60fvm rks50 60fvma rks50 60fvlt 228
- Rks71fvm rks71fvlt rks71gvmg 228
- Si04 703a piping diagrams 228
- Appendix 229
- Piping diagrams si04 703a 229
- Rks71fvma 229
- Appendix 219 230
- Heat pump 230
- Rxs50 60fvma rxs50 60fvlt 230
- Rxs71 80 90fvma 230
- Si04 703a piping diagrams 230
- Appendix 231
- Piping diagrams si04 703a 231
- Rxs71fvlt 231
- Appendix 221 232
- Ftks50 60 71fvlt ftxs50 60 71fvlt 232
- Ftks50 60 71fvm ftks50 60 71fvma ftxs50 60 71 80 90fvma 232
- Indoor units 232
- Si04 703a wiring diagrams 232
- Wiring diagrams 232
- Appendix 233
- Cooling only 233
- Outdoor units 233
- Rks50 60fvm rks50 60fvma rks50 60fvlt 233
- Rks71fvm rks71fvlt rks71gvmg 233
- Wiring diagrams si04 703a 233
- Appendix 223 234
- D053930b 234
- Rks71fvma 234
- Si04 703a wiring diagrams 234
- Appendix 235
- D050706h 235
- D053931b 235
- Heat pump 235
- Rxs50 60fvma rxs50 60fvlt 235
- Rxs71 80 90fvma 235
- To indoor unit 235
- Wiring diagrams si04 703a 235
- Appendix 225 236
- D052296e 236
- Rxs71fvlt 236
- Si04 703a wiring diagrams 236
- Numerics 238
- Drawings flow charts 242
- Numerics 242
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